The document summarizes a study measuring water pressure and temperature at Gooseberry Island Causeway over multiple days. Sensors were placed on both sides of the causeway and recorded a differential of up to 12 inches in water height, indicating the causeway is restricting tidal flow. This supports the conclusion that the 1997 study underestimated the causeway's environmental impact by changing water circulation in the harbor. Additional observations of tide-temperature patterns and anomalies in temperature readings over time suggest more information could be gleaned with further analysis.
A lot of effort has gone into cloud storage peformance benchmarking, both of swift and other cloud stacks and part of the result is a lot of confusion in the numbers, in large part because there is no standard. This is further complicated because some implementations are written in java, some in python and some in raw curl. Furthermore, the underlying libraries themselves can cause variances as they do not all use the same buffer sizes, enable/disable ssl-compression and probably other parameters as well.
I would like to talk about our benchmarking methodologies at HP as well as describe a tool suite I've developed that implements them and share some results of benchmarking our own OpenStack implementation. One thing I've discovered over previous months of testing is that both latency and cpu overhead can have a major impact on performance and those are captured as well, something most tools typically don't report.
The tools are written in python and use the OpenStack python-swiftclient library.
Speakers
Mark Seger
The Quantum Northwest qpod 2e: Peltier Temperature Control for Fiber Optic Sp...Jeanne Small
The Quantum Northwest qpod 2e is a Peltier-based, temperature-controlled sample compartment for fiber optic spectroscopy. Use it with spectrometers and light sources from Ocean Optics, Avantes, and Stellar Net, for example. This slide presentation shows the great utility of the qpod 2e with Avantes spectrometers.
Increase Your Maintenance Teams Productivity WebinarTranscat
Hosted by Transcat and presented by Fluke, this webinar shows how to increase your maintenance teams productivity to lower down time. Presented on March 20, 2013.
Automating Semantic Metadata Collection in the Field with Mobile ApplicationDeborah McGuinness
Presentation at Mobile Deployment of Semantic Technologies Workshop at the International Semantic Web Conference. Abstract: In the past few decades, the field of ecology has grown from a collection of disparate researchers who collected data on their local phenomenon by hand, to large ecosystems-oriented projects partially fueled by automated sensor networks and a diversity of models and experiments. These modern projects rely on sharing and integrating data to answer questions of increasing scale and complexity. Interpreting and sharing the big data sets generated by these projects relies on information about how the data was collected and what the data is about, typically stored as metadata. Metadata ensures that the data can be interpreted and shared accurately and efficiently. Traditional paper-based metadata collection methods are slow, error-prone, and non-standardized, making data sharing difficult and inefficient. Semantic technologies offer opportunities for better data management in ecology, but also may pose a challenging learning curve to already busy researchers. This paper presents a mobile application for recording semantic metadata about sensor network deployments and experimental settings in real time, in the field, and without expecting prior knowledge of semantics from the users. This application enables more efficient and less error-prone in-situ metadata collection, and generates structured and shareable metadata.
This document discusses how visualization can help make IT security possible when dealing with large scale infrastructure. It describes some common security tools like antivirus software, firewalls, and intrusion detection systems that are used but have limitations. The document then introduces parallel coordinate visualization as a tool that can help analyze large volumes of log and event data to help detect unknown attacks and behaviors. It provides examples of how parallel coordinates could be used to visualize and analyze squid proxy logs, Apache logs, and OpenVPN tunnels. The conclusion is that traditional visualization often fails at scale but parallel coordinates enables analyzing large datasets to find the unknown and understand logs better.
- Engr. Abdul Raza is a civil engineer with extensive experience in infrastructure projects including building construction, airport construction, and water supply projects.
- He currently works as an Assistant Resident Engineer on the expansion and renovation of Quetta International Airport, where he monitors contractor actions and ensures compliance with project specifications.
- Prior to his current role, he has worked on other infrastructure projects in various roles involving supervision, quality control, scheduling, and reporting.
The document provides an organizational structure for the Florida Lottery as of June 30, 2001. It lists the offices, divisions and sections that make up the lottery including the Office of the Secretary, Division of Security and Administration, Division of Human Resources Management, Product Development, Games Administration and Compliance, and Finance and Budget. It provides brief descriptions of the responsibilities of each part of the organizational structure.
A lot of effort has gone into cloud storage peformance benchmarking, both of swift and other cloud stacks and part of the result is a lot of confusion in the numbers, in large part because there is no standard. This is further complicated because some implementations are written in java, some in python and some in raw curl. Furthermore, the underlying libraries themselves can cause variances as they do not all use the same buffer sizes, enable/disable ssl-compression and probably other parameters as well.
I would like to talk about our benchmarking methodologies at HP as well as describe a tool suite I've developed that implements them and share some results of benchmarking our own OpenStack implementation. One thing I've discovered over previous months of testing is that both latency and cpu overhead can have a major impact on performance and those are captured as well, something most tools typically don't report.
The tools are written in python and use the OpenStack python-swiftclient library.
Speakers
Mark Seger
The Quantum Northwest qpod 2e: Peltier Temperature Control for Fiber Optic Sp...Jeanne Small
The Quantum Northwest qpod 2e is a Peltier-based, temperature-controlled sample compartment for fiber optic spectroscopy. Use it with spectrometers and light sources from Ocean Optics, Avantes, and Stellar Net, for example. This slide presentation shows the great utility of the qpod 2e with Avantes spectrometers.
Increase Your Maintenance Teams Productivity WebinarTranscat
Hosted by Transcat and presented by Fluke, this webinar shows how to increase your maintenance teams productivity to lower down time. Presented on March 20, 2013.
Automating Semantic Metadata Collection in the Field with Mobile ApplicationDeborah McGuinness
Presentation at Mobile Deployment of Semantic Technologies Workshop at the International Semantic Web Conference. Abstract: In the past few decades, the field of ecology has grown from a collection of disparate researchers who collected data on their local phenomenon by hand, to large ecosystems-oriented projects partially fueled by automated sensor networks and a diversity of models and experiments. These modern projects rely on sharing and integrating data to answer questions of increasing scale and complexity. Interpreting and sharing the big data sets generated by these projects relies on information about how the data was collected and what the data is about, typically stored as metadata. Metadata ensures that the data can be interpreted and shared accurately and efficiently. Traditional paper-based metadata collection methods are slow, error-prone, and non-standardized, making data sharing difficult and inefficient. Semantic technologies offer opportunities for better data management in ecology, but also may pose a challenging learning curve to already busy researchers. This paper presents a mobile application for recording semantic metadata about sensor network deployments and experimental settings in real time, in the field, and without expecting prior knowledge of semantics from the users. This application enables more efficient and less error-prone in-situ metadata collection, and generates structured and shareable metadata.
This document discusses how visualization can help make IT security possible when dealing with large scale infrastructure. It describes some common security tools like antivirus software, firewalls, and intrusion detection systems that are used but have limitations. The document then introduces parallel coordinate visualization as a tool that can help analyze large volumes of log and event data to help detect unknown attacks and behaviors. It provides examples of how parallel coordinates could be used to visualize and analyze squid proxy logs, Apache logs, and OpenVPN tunnels. The conclusion is that traditional visualization often fails at scale but parallel coordinates enables analyzing large datasets to find the unknown and understand logs better.
- Engr. Abdul Raza is a civil engineer with extensive experience in infrastructure projects including building construction, airport construction, and water supply projects.
- He currently works as an Assistant Resident Engineer on the expansion and renovation of Quetta International Airport, where he monitors contractor actions and ensures compliance with project specifications.
- Prior to his current role, he has worked on other infrastructure projects in various roles involving supervision, quality control, scheduling, and reporting.
The document provides an organizational structure for the Florida Lottery as of June 30, 2001. It lists the offices, divisions and sections that make up the lottery including the Office of the Secretary, Division of Security and Administration, Division of Human Resources Management, Product Development, Games Administration and Compliance, and Finance and Budget. It provides brief descriptions of the responsibilities of each part of the organizational structure.
This document summarizes new features in version 6.5 of a seismic data processing software. Key updates include: allowing restacking during velocity analysis for faster picking; managing projects using SeisCat; accessing imaging tools via the Launcher; adding Octave deghosting to imaging; adding a module to apply static corrections in batch; and making velocity editing easier. It also lists features from version 6.4 such as residual moveout processing, slant cable deghosting, curved ray anisotropic migration, and improvements to parallel processing and 3D grids.
1. The document summarizes an overseas study tour organized by Ethiopia's National Disaster Risk Management Commission and UNDP to Kenya from December 4-16, 2016. The tour aimed to improve skills and knowledge on early warning systems and disaster risk management.
2. The tour involved visits to organizations that generate climate information as well as those that utilize it for disaster risk management. They visited monitoring institutions, government disaster management agencies, international NGOs, and community-based risk management groups.
3. The goal was to learn best practices for establishing an effective early warning system in Ethiopia and to understand how to collect, process, and disseminate early warning information to end users and support climate-resil
Coaching Entrepreneurs To Stronger Leadership and Life BalanceMaura Jakksen Byrne
Entrepreneur coaching is a one-on-one partnership where a coach helps an entrepreneur achieve their goals by identifying obstacles and using coaching methods to support the entrepreneur's performance. Coaching puts business owners on a fast track to higher personal performance, more resilient leadership, and greater business success by creating awareness, engagement, responsibility, and action through goal setting. Positive changes in brain chemistry occur when goals are set and achieved.
El documento presenta definiciones breves de los conceptos de resiliencia, serendipidad, inteligencia emocional, sinergia y coaching. La resiliencia se refiere a la capacidad de sobreponerse a problemas. La serendipidad es un descubrimiento afortunado e inesperado. La inteligencia emocional es la capacidad de manejar las emociones. La sinergia es lograr un objetivo a través de la colaboración y complementariedad. Coaching es apoyar a otros a desarrollar su máximo potencial.
MCA Worx offers integrated staff management services, including recruitment, payroll administration, and handling disciplinary procedures, to allow clients to focus on their core business instead of human resources tasks. Their services are tailored to each client's needs and scale and aim to improve productivity while ensuring a motivated, legally compliant workforce. MCA Worx prides itself on transparency, responsiveness, and building trust through integrity and innovation in staff management.
Tissues are groups of cells that work together to perform specialized functions. There are four main types of tissues: epithelial, connective, muscular, and nervous. Epithelial tissue forms coverings and linings throughout the body. It is classified based on cell arrangement (simple, pseudostratified, stratified) and cell shape (squamous, cuboidal, columnar). The major epithelial tissues include simple squamous, simple cuboidal, simple columnar, pseudostratified columnar, and stratified squamous epithelium.
Offshore Europe Technology Zone Presentation John Gibbs
Event on 5-8th September 2017 in Aberdeen discussing 'Big Data at Low' cost whist also introducing the Seatooth Pipelogger, Seatoth SwiCOM and Seatooth Lightrope ...
Demonstrating a Pre-Exascale, Cost-Effective Multi-Cloud Environment for Scie...Igor Sfiligoi
Presented at PEARC20.
This talk presents expanding the IceCube’s production HTCondor pool using cost-effective GPU instances in preemptible mode gathered from the three major Cloud providers, namely Amazon Web Services, Microsoft Azure and the Google Cloud Platform. Using this setup, we sustained for a whole workday about 15k GPUs, corresponding to around 170 PFLOP32s, integrating over one EFLOP32 hour worth of science output for a price tag of about $60k. In this paper, we provide the reasoning behind Cloud instance selection, a description of the setup and an analysis of the provisioned resources, as well as a short description of the actual science output of the exercise.
This document provides information on various data loggers in the EasyLog EL-USB series. It includes:
1. A table comparing the key specifications of different models, including their measurement functions, ranges, and resolutions. Models measure temperature, humidity, voltage, current and other parameters.
2. Descriptions of common features across the series such as the programmable alarms, memory storage, and LED indicators. Loggers interface with PCs via USB to set up and download data.
3. An overview of the simple programming and deployment process for the loggers, as well as the easy method to upload and analyze the recorded data on a PC.
Large Infrastructure Monitoring At CERN by Matthias Braeger at Big Data Spain...Big Data Spain
Session presented at Big Data Spain 2015 Conference
15th Oct 2015
Kinépolis Madrid
http://www.bigdataspain.org
Event promoted by: http://www.paradigmadigital.com
Abstract: http://www.bigdataspain.org/program/thu/slot-7.html
How i built my own irrigation controllerShree Kumar
This document outlines the speaker's journey in building their own battery-operated irrigation controller using low-power microcontrollers and Bluetooth connectivity. They designed the controller to have a long battery life, be inexpensive to produce in small quantities, and be controllable via a smartphone app or other devices. Key aspects of the design included using a low-power TI MSP430 microcontroller, latching valves, an LCD display, and a character-based Bluetooth serial protocol for communication and control. The speaker hopes to make the design and code open source to allow others to build on it or create their own control applications.
High-Volume Data Collection and Real Time Analytics Using Rediscacois
In this talk, we describe using Redis, an open source, in-memory key-value store, to capture large volumes of data from numerous remote sources while also allowing real-time monitoring and analytics. With this approach, we were able to capture a high volume of continuous data from numerous remote environmental sensors while consistently querying our database for real time monitoring and analytics.
* See more of my work at http://www.codehenge.net
Reducing costs through subsea wireless automation June 2017John Gibbs
This presentation explores the latest subsea wireless products and automation technologies including hybrid wireless, Subsea Internet of Things and Subsea Cloud Computing and their use to increase production, reduce operating costs, reduce asset integrity management costs and extend asset life.
Andy Smerdon - Fisherman OceanographersAndy Smerdon
This document discusses a project between Aquatec Group and fishermen to collect oceanographic data. Aquatec developed a low-cost instrument that fishermen attach to fishing gear to record temperature and depth over time. When retrieved, the instrument automatically transmits the data to a reader unit via wireless technology. This provides fishermen near real-time environmental data and oceanography institutes with highly spatially and temporally resolved coastal data at a low per data point cost by leveraging existing fishing operations. Examples from U.S. and U.K. fisheries demonstrate how the data provides scientific insights and improves oceanographic models.
This document summarizes a lecture on file systems and performance. It discusses the read/write process for magnetic disks involving seek time, rotational latency, and transfer time. Typical numbers for these parameters in magnetic disks are provided. Flash/SSD memory is also discussed as an alternative storage technology with advantages like low latency, no moving parts, and high throughput but also drawbacks like limited endurance. The document introduces concepts from queueing theory that can help analyze the performance of I/O systems, like modeling request arrival and service times as probabilistic distributions. Key metrics like response time and throughput are discussed for evaluating I/O performance.
The DXN from Dynasonics is a Portable ultrasonic flow meter capable of measuring liquid flow with multiple technologies, including: Doppler, transit time and liquid thermal flow. Easy to install by clamping transducers onto the outside of the pipe, the meter measures flow using the non-invasive ultrasonic sensors and takes over 100 readings a second. With the industry’s only advanced touch-screen interface featuring job-specific controls this is one portable meter that really can do it all.
We integrate different equipments (Thunder Tiger Submarine, QNAP QBoat Sunny IoT storage device, color detector sensor, temperature sensor, Arduino) & Communication system (Sigfox) to build a solution to create freshwater monitoring and communication system.
This document summarizes new features in version 6.5 of a seismic data processing software. Key updates include: allowing restacking during velocity analysis for faster picking; managing projects using SeisCat; accessing imaging tools via the Launcher; adding Octave deghosting to imaging; adding a module to apply static corrections in batch; and making velocity editing easier. It also lists features from version 6.4 such as residual moveout processing, slant cable deghosting, curved ray anisotropic migration, and improvements to parallel processing and 3D grids.
1. The document summarizes an overseas study tour organized by Ethiopia's National Disaster Risk Management Commission and UNDP to Kenya from December 4-16, 2016. The tour aimed to improve skills and knowledge on early warning systems and disaster risk management.
2. The tour involved visits to organizations that generate climate information as well as those that utilize it for disaster risk management. They visited monitoring institutions, government disaster management agencies, international NGOs, and community-based risk management groups.
3. The goal was to learn best practices for establishing an effective early warning system in Ethiopia and to understand how to collect, process, and disseminate early warning information to end users and support climate-resil
Coaching Entrepreneurs To Stronger Leadership and Life BalanceMaura Jakksen Byrne
Entrepreneur coaching is a one-on-one partnership where a coach helps an entrepreneur achieve their goals by identifying obstacles and using coaching methods to support the entrepreneur's performance. Coaching puts business owners on a fast track to higher personal performance, more resilient leadership, and greater business success by creating awareness, engagement, responsibility, and action through goal setting. Positive changes in brain chemistry occur when goals are set and achieved.
El documento presenta definiciones breves de los conceptos de resiliencia, serendipidad, inteligencia emocional, sinergia y coaching. La resiliencia se refiere a la capacidad de sobreponerse a problemas. La serendipidad es un descubrimiento afortunado e inesperado. La inteligencia emocional es la capacidad de manejar las emociones. La sinergia es lograr un objetivo a través de la colaboración y complementariedad. Coaching es apoyar a otros a desarrollar su máximo potencial.
MCA Worx offers integrated staff management services, including recruitment, payroll administration, and handling disciplinary procedures, to allow clients to focus on their core business instead of human resources tasks. Their services are tailored to each client's needs and scale and aim to improve productivity while ensuring a motivated, legally compliant workforce. MCA Worx prides itself on transparency, responsiveness, and building trust through integrity and innovation in staff management.
Tissues are groups of cells that work together to perform specialized functions. There are four main types of tissues: epithelial, connective, muscular, and nervous. Epithelial tissue forms coverings and linings throughout the body. It is classified based on cell arrangement (simple, pseudostratified, stratified) and cell shape (squamous, cuboidal, columnar). The major epithelial tissues include simple squamous, simple cuboidal, simple columnar, pseudostratified columnar, and stratified squamous epithelium.
Offshore Europe Technology Zone Presentation John Gibbs
Event on 5-8th September 2017 in Aberdeen discussing 'Big Data at Low' cost whist also introducing the Seatooth Pipelogger, Seatoth SwiCOM and Seatooth Lightrope ...
Demonstrating a Pre-Exascale, Cost-Effective Multi-Cloud Environment for Scie...Igor Sfiligoi
Presented at PEARC20.
This talk presents expanding the IceCube’s production HTCondor pool using cost-effective GPU instances in preemptible mode gathered from the three major Cloud providers, namely Amazon Web Services, Microsoft Azure and the Google Cloud Platform. Using this setup, we sustained for a whole workday about 15k GPUs, corresponding to around 170 PFLOP32s, integrating over one EFLOP32 hour worth of science output for a price tag of about $60k. In this paper, we provide the reasoning behind Cloud instance selection, a description of the setup and an analysis of the provisioned resources, as well as a short description of the actual science output of the exercise.
This document provides information on various data loggers in the EasyLog EL-USB series. It includes:
1. A table comparing the key specifications of different models, including their measurement functions, ranges, and resolutions. Models measure temperature, humidity, voltage, current and other parameters.
2. Descriptions of common features across the series such as the programmable alarms, memory storage, and LED indicators. Loggers interface with PCs via USB to set up and download data.
3. An overview of the simple programming and deployment process for the loggers, as well as the easy method to upload and analyze the recorded data on a PC.
Large Infrastructure Monitoring At CERN by Matthias Braeger at Big Data Spain...Big Data Spain
Session presented at Big Data Spain 2015 Conference
15th Oct 2015
Kinépolis Madrid
http://www.bigdataspain.org
Event promoted by: http://www.paradigmadigital.com
Abstract: http://www.bigdataspain.org/program/thu/slot-7.html
How i built my own irrigation controllerShree Kumar
This document outlines the speaker's journey in building their own battery-operated irrigation controller using low-power microcontrollers and Bluetooth connectivity. They designed the controller to have a long battery life, be inexpensive to produce in small quantities, and be controllable via a smartphone app or other devices. Key aspects of the design included using a low-power TI MSP430 microcontroller, latching valves, an LCD display, and a character-based Bluetooth serial protocol for communication and control. The speaker hopes to make the design and code open source to allow others to build on it or create their own control applications.
High-Volume Data Collection and Real Time Analytics Using Rediscacois
In this talk, we describe using Redis, an open source, in-memory key-value store, to capture large volumes of data from numerous remote sources while also allowing real-time monitoring and analytics. With this approach, we were able to capture a high volume of continuous data from numerous remote environmental sensors while consistently querying our database for real time monitoring and analytics.
* See more of my work at http://www.codehenge.net
Reducing costs through subsea wireless automation June 2017John Gibbs
This presentation explores the latest subsea wireless products and automation technologies including hybrid wireless, Subsea Internet of Things and Subsea Cloud Computing and their use to increase production, reduce operating costs, reduce asset integrity management costs and extend asset life.
Andy Smerdon - Fisherman OceanographersAndy Smerdon
This document discusses a project between Aquatec Group and fishermen to collect oceanographic data. Aquatec developed a low-cost instrument that fishermen attach to fishing gear to record temperature and depth over time. When retrieved, the instrument automatically transmits the data to a reader unit via wireless technology. This provides fishermen near real-time environmental data and oceanography institutes with highly spatially and temporally resolved coastal data at a low per data point cost by leveraging existing fishing operations. Examples from U.S. and U.K. fisheries demonstrate how the data provides scientific insights and improves oceanographic models.
This document summarizes a lecture on file systems and performance. It discusses the read/write process for magnetic disks involving seek time, rotational latency, and transfer time. Typical numbers for these parameters in magnetic disks are provided. Flash/SSD memory is also discussed as an alternative storage technology with advantages like low latency, no moving parts, and high throughput but also drawbacks like limited endurance. The document introduces concepts from queueing theory that can help analyze the performance of I/O systems, like modeling request arrival and service times as probabilistic distributions. Key metrics like response time and throughput are discussed for evaluating I/O performance.
The DXN from Dynasonics is a Portable ultrasonic flow meter capable of measuring liquid flow with multiple technologies, including: Doppler, transit time and liquid thermal flow. Easy to install by clamping transducers onto the outside of the pipe, the meter measures flow using the non-invasive ultrasonic sensors and takes over 100 readings a second. With the industry’s only advanced touch-screen interface featuring job-specific controls this is one portable meter that really can do it all.
We integrate different equipments (Thunder Tiger Submarine, QNAP QBoat Sunny IoT storage device, color detector sensor, temperature sensor, Arduino) & Communication system (Sigfox) to build a solution to create freshwater monitoring and communication system.
Tanel Poder - Troubleshooting Complex Oracle Performance Issues - Part 1Tanel Poder
The document describes troubleshooting a complex performance issue in an Oracle database. Key details:
- The problem was sporadic extreme slowness of the Oracle database and server lasting 1-20 minutes.
- Initial AWR reports and OS metrics showed a spike at 18:10 with CPU usage at 66.89%, confirming a problem occurred then.
- Further investigation using additional metrics was needed to fully understand the root cause, as initial diagnostics did not provide enough context about this brief problem period.
The document describes WETNET, a consortium created through an EU eco-innovation initiative to develop a new, low-cost technology for monitoring water flow and pressure. The technology includes pulse flow meters and sample flow meters, data loggers, and open source supervisory software. This system is intended to help detect and reduce water leaks in distribution networks to lower costs and conserve resources.
Burst data retrieval after 50k GPU Cloud runIgor Sfiligoi
We ran a 50k GPU multi-cloud simulation to support the IceCube science. This talk provided an overview of what happened to the associated data.
Presented at the Internet2 booth at SC19.
Subsea control down under subsea internet of thingsJohn Gibbs
Subsea Internet of Things Technology enables a network of smart, wireless sensors and devices to be configured to provide performance, condition and diagnostic information
This document describes the design of an automatic water dispenser to reduce water wastage and improve efficiency. The system uses an ultrasonic sensor and Arduino UNO microcontroller to detect objects and trigger a solenoid valve to dispense water when an object is present. Water flow is controlled to prevent excessive spillage before the valve closes once the desired amount is dispensed. The design aims to develop a more advanced water dispenser with potential applications in homes and factories.
6. Currents and wave action
that once flowed over the
tombolo …
… began circulating in an
eddy.
BEFORE
AFTER
Thesis: The Change
7. Thesis: The Result
Sand is transported toward
the harbor by new Westerly
current
Sand is deposited in the
harbor
Nitrogen comes out of the
river with every tide but
circulates back in
8. Thesis: The Fix
Equilibrium is restored and
sand begins accumulating
again
The harbor is no longer
threatened by sandbars
Nitrogen flushes more
thoroughly with each tide
cycle
Remove the causeway
9. Eddy currents are the result of
a textbook “groyne”
GROYNE
GROYNE
Source: Yossef 2005
10. Opposition
In 1997, the Department of Environmental Management
commissioned a study that concluded
the causeway has no appreciable environmental impact.
11. Objective
Cast doubt on the 1997 study and compel the
Department of Environmental Management to
re-examine impact of the causeway.
12. Objective
Would water flow if there was no causeway?
- in other words -
Is the water level higher on one side than
the other creating the potential for flow?
Height West Height East
13. Approach
Using survey tools, physically measure the height of the two sides and
calculate the difference.
Impractical to collect measurements over days and difficult at night.
15. Approach
But the bottom is not the same on both sides, one side is going to
be lower than the other. How would we know the offset?
Combine approaches?
19. Device Requirements
• Read Pressure up to 25 feet under water
• Accurate to less than 1 inch
• Submersible
• Runs on battery for several days
• Inexpensive
• Small
20. COTS Hardware Components
BMP180
Pressure range: 300 ... 1100hPa (-34 feet below sea level, salt water)
Low power: 5µA at 1 sample / sec. in standard mode
Low noise: 0.02hPa (0.17m) advanced resolution mode
DS3231 Real Time Clock
Accurate to within 1 second per year
Button battery maintains time between uses
Low power
32u4 Adalogger
ATmega32u4 @ 8MHz
2K RAM
MicroSD card holder
Built in 100mA lipoly charger
27. Requirements (review)
Read Pressure up to 25 feet under water
Accurate to less than 1 inch
Submersible
Runs on battery for several days
Inexpensive
Small
Units are calibrated
28. Issues
One device went bad –
not sure why.
Spider Crab found in one
container – outer bag
was punctured
Units are not reporting
on exactly same interval –
adjusted in Excel but very
time consuming!
time
29. Software/Hardware Enhancement
• Fix time drift
– Hardware:
• Jump 1Hz Square Wave Signal to readable pin
(yellow cable, SQW to A2)
– Software:
• Decrement counter on rising signal (A2)
• Log data when counter = 0
– Reset counter to 60 (or whatever I want)
A2 = I Hz
A2
30. Additional Software Enhancements
• Switch from JSON to CSV – more convenient
for Excel
• Added Device ID to filename – easier to keep
track
• Added Date to file in OS – easier for managing
archive
34. Conclusion
• West side averages 6” higher than East side
• Peaks about 12” per tide cycle
• Is level or slightly below per tide cycle
• Causeway holding back 6” inches of water across a 900 feet.
• Holding back or redirecting this much potential energy is certain to have an
appreciable environmental impact.
QED
This presentation is a story about an environmental problem.
It’s about evidence gathering and case building using an Arduino-base sensor.
I refer to IoT because the device benefits from many of the COTS devices that have become available thanks to the IoT revolution.
Over the last five decades, three problems have emerged in the Westport shoreline and waterways.
Sandbars have developed in the harbor requiring the Army Corps of Engineers to dredge.
Algae blooms are occurring regularly and tests show unexpectedly high levels of nitrogen.
The once sandy beach is becoming a stony beach.
What changed?
During WWII, the Army Corps of Engineers constructed submarine lookout towers on Gooseberry Island. For enable access, they Corps created the causeway.
So here’s the problem …
Every time residents try to discuss the impact of the causeway with the State, the State deflects the conversation with a study that concludes that the causeway has no appreciable environmental impact.
The study was conducted by a well-known oceanographic team out of the Woods Hole Oceanographic Institution
The objective of this study is to cast doubt on the study by showing that the causeway is interrupting a current and either holding it back or redirecting it as we contend.
The Approach is to use pressure sensors to collect readings over a week.
Then. we tie the readings to a reference reading taken through a single reading using traditional survey equipment.
AdaFruit calls their processor board a “Feather” and they call their shields “Wings”.
Metaphorically, I think they have it backwards but you get the idea – the components are designed to be soldered straight-through – effectively creating a bus.
The exception was the sensor which had to be accommodated differently, but with only 4 wires.
SDA and SCL were connected on pins, the black and red supply power.
The yellow cable pictured came later – I will explain it later.
Device reports pressure in hPa = hectopascal (100 pascals) = one millibar.
Sea level at 45deg Latitude is generally accepted to average 1000 millibars, or 1 ATM.
We are at about 42deg Latitude but daily changes in weather are more likely responsible for the value of 1013.78 when I dropped the devices.
Four devices were dropped in the water, three collected data and the fourth collected no data.
The three signals are plotted above and are highly synchronized – very good news!
Pressure readings are aligned to within thousandths of an inch.
Temperature readings (which we don’t really need) are aligned to within half degree C.
There were three issues
One of the devices failed – all three components tested bad – not sure why – NO ACTION
A Spider Crab got into one of the containers and punctured an outer bag – KEEP TRIPLE BAGGING
The microprocessors seem to be executing identical instructions at slightly different processor speeds which meant adding “catch-up” rows in analysis – FIX IN SOFTWARE/HARDWARE
Because the real time clock is much more accurate than the crystal driving the microprocessor, using it to guide reading interval ensures alignment.
Jump the RTC’s 1Hz signal to a readable pin. Because A2 is right beside it, why not?
What would have been a better way to do this?
(Set an interrupt)
I deferred in the interest of time. This is called “technical debt” because it should be documented as a bug/enhancement then prioritized for the future.
What’s going on in the third and fourth cycles?
(Wind direction changed)
We know that the water level on both sides goes up and down but to simplify the visualization, I have represented the relative differential on one side.
The West side, Rhode Island Sound side, averages about 6” inches higher than the East side, Buzzards Bay.
The causeway is holding back and average of 6” inches of water across a 900 foot span.
Holding back or redirecting this much potential energy is certain to have an appreciable environmental impact.
If we placed sensors along the beach, could we detect the circulation of warm water – warm water carrying nitrogen that should be flushed but is instead heading back into the river.
Can we learn anything from the temperature across the causeway?
Unit 1 is on the West side, Unit 3 is on the East side.
Wind was blowing out of the South East from 7/31 to 8/2 then return to a prevailing South West wind after. Thus, it appears that Buzzards Bay is warmer than Rhode Island Sound on a South East wind but more typically, Rhode Island Sound is warmer.
Temperature fluctuations are greater on the Rhode Island Sound Side (blue). We know that the Gulf Stream temps do not fluctuate this much therefore we can deduce that this warm water is coming out of the river. Judging by the location of the sensor, this warm water has no other place to go than back into the river.
This presentation is a story about an environmental problem.
It’s about evidence gathering and case building using an Arduino-base sensor.
I refer to IoT because the device benefits from many of the COTS devices that have become available thanks to the IoT revolution.